Determining Characteristic Sand Shear Parameters of Strength via a Direct Shear Test

Skuodis, Šarūnas; Norkus, Arnoldas; Dirgėlienė, Neringa; Rimkus, Liudvikas

doi:10.3846/13923730.2015.1073174

Cited by 6 publications

(5 citation statements)

References 16 publications

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“…However, processing data on 2-4 tests end in the large distribution of strength properties, which finally results in a significant reduction of characteristic shear strength parameters [39]. Such quantity of tests allows avoiding the influence of the magnitude factor of the vertical load, for determining shear strength parameters [40].…”

Section: Test Proceduresmentioning

confidence: 99%

Effect of Grain Size and Distribution on Mechanical Behavior of Dune Sand

Boudia

Berga

2021

Civ Eng J

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Sand is a major component of soils. It is widely used in manufacturing and construction. In geomechanics, one characterizes sand according to various aims. This paper investigates, for local sands, the effect of grain size and granular distribution on the mechanical behavior in terms of strength and stress-strain relationship. For this purpose, dune sands of the great Occidental Erg, from Algeria, are analyzed, according to the Mohr-Coulomb criterion. The study uses three kinds of sands. Every kind is divided into three sizes classes. Then, the experimental program conducts a set of direct shear tests, under various vertical stresses, using the small shear box (60 × 60 mm). The results show that the particle size and distribution have a direct effect on the mechanical behavior of the dune sand. Then, the dominant size class governs the natural sand behavior. Moreover, the peak shear strength increases as particle size increases. This indicates that there is an increase in peak friction angle with the increase of particles size and the sands consider as a purely cohesionless material. In addition, the experimental analysis shows that density and confinement stress is not sufficient to interpret the mechanical behavior. Indeed, mineralogy and surface state can influence the shear strength. These conclusions lead to the relevance of the sand genesis and the importance of the local materials thematic. Doi: 10.28991/cej-2021-03091730 Full Text: PDF

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Section: Test Proceduresmentioning

confidence: 99%

Effect of Grain Size and Distribution on Mechanical Behavior of Dune Sand

Boudia

Berga

2021

Civ Eng J

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“…Pavyzdžiui, atliekant nesankabių gruntų bandymus su didėjančiomis apkrovomis, purių gruntų vidinės trinties kampas didėja, o tankių -mažėja (Ghazavi et al, 2008;Bareither et al, 2008). Taip pat grunto mechaninių savybių verčių patikimumas priklauso nuo bandymų kiekio (Skuodis et al, 2016).…”

Section: įVadasunclassified

Analysis of the Traffic Load–induced Stresses of Embankment

Zakarka

2022

Science - Future of Lithuania

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This article represents traffic loads on the road structure distribution and evaluation of the vertical and horizontal stresses formation in the soil embankment. This evaluation allows to predict the depth and intensity of the propagation of additional stresses resulting from traffic loads. The calculations were performed in accordance with four normative documents applied in Lithuania, which define the loads on the road structure. The obtained results showed that the area to which the load is distributed has the greatest influence on the intensity of stresses and the distance of propagation. The maximum horizontal stress in the embankment was found to be no more than 70 kPa and the maximum stress propagation depth did not exceed 0.9 m. The results can be applied to a triaxial test apparatus to restore horizontal stresses in the embankment. It is recommended to select a lateral pressure from 20 kPa to 70 kPa for tests provided with triaxial test device. The mechanical properties of the soil determined with triaxial test device and recommended lateral pressure would be representative of the test results obtained in the field of embankment.

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“…The mechanical behavior and properties of dry loose quartz sand are characterized by several types of experiments such as the direct shear test [25], uniaxial compression test [28], and the triaxial test [21,26,27]. The triaxial test is used to obtain the shear strength of a sample in the principal axes under confining pressure.…”

Section: Introductionmentioning

confidence: 99%